Garage door maintenance, every two years, regular as clockwork. In Southern California, with all the dust and the dry desert heat, you have to clean them down and regrease regularly. If you don't, they get real noisy, and then they fail. I've looked at closed system units, but they aren't worth the cost vs the 20 or so minutes of biennial maintenance. I'd rather have $3 of plastic gears strip out that I can reorder through a dozen different supplies than actual damage to my door or the infrastructure that holds the door. Though that has become less of an issue on newer units with excessive force sensors.

I bought and installed a Sommer Evo+ (German made), after Chamberlain, Craftsman products crapped out prematurely. So far, so good (7 years), extremely quiet; slow, but well put together.